Yes, the best filter media ...

Yes, the best filter media is Activated Filter Media. It has 30-80% better performance and a more reliable and consistent filtration than sand confirmed by independent testing. Biofilm and scaling will not occur and hence chemicals are not needed. The media is self-cleaning, self-charging and self-sterilising, therefore it does not need to be cleaned or changed during the lifetime of the filter. The oldest media in operation at the moment is over 20 years and it is expected to last over 30 years. 

I am experienced in the use of this product and filtration processes in Asia and Australia. Please email me at andrew@waterandoilsolutions.com.au and I will be happy to provide case studies, referrals, and other literature on the product.